Well Jerry, I am not much help with the dimensions. However, hopefully here is a helpful thought. First there were no holes on the original it contains Four studs secured to the foot well panel. So you might attach the mounting brackets to the servo and trial locate it on the panel. the drum should face the engine. when you are satisfied with a position, mark one of the bracket's holes on the bottom panel. Drill a hole at that location and put a bolt in place to anchor the servo. now locate the other holes and drill them. Go to the hardware store and get Four SS toilet mounting bolts. Install them from inside the car and bolt up the servo. If you have a welder you can spot weld the bolts to the floor inside. The flat heads of these bolts will minimise interference with the carpeting when it is reinstalled.---Fwiw--Keoke